Hopefully this will be one of many SCCM 2012 "Console Extensions". One thing you have already noticed is that 2012 is now Ribbon Based so we can't call them "Right Click" tools. You may already be familiar with Greg Ramsey's Guid Locator method for 2007. http://myitforum.com/cs2/blogs/gramsey/archive/2008/05/05/sccm-2007-console-extensions-guid-locator.aspx
Here is the version I created for 2012. Basically I looped through the XML Console files and create a tools folder and file based on each GUID in the Default section of the Ribbon. This might not be a totally exhaustive list but I think it should be a good start. The file/folders are pulled from the Beta 2 version currently downloaded from Microsoft.
The Zip file is the actions folder and should be extracted in the Actions Folder (
%ProgramFiles%\Microsoft Configuration Manager\AdminUI\XmlStorage\Extensions\Actions)
I hope to update this as the SDK is updateded. This way you can see the changes in the Console Extensions. Once everything is published I hope to see about creating a tool to converted the XML 2007 format to the XML 2012 format, which is slightly different.